Three huntite aluminoborates of stoichiometry REAl3(BO3)4 (RE = Tb, Dy, Ho) were synthesized by slow cooling within a K2Mo3O10 flux with spontaneous crystallization. The crystal structures were determined using single-crystal X-ray diffraction (SC-XRD) data. The synthesized borates are isostructural to the huntite [CaMg(CO3)4] structure, crystalized within the trigonal R32 space group, and their structural parameters were compared to literature data of other huntite REAl3(BO3)4 crystals within the R32 space group. All three borates fit well into the trends calculated from the literature data. The unit cell parameters and volume increase linearly whereas the density decreases linearly with larger RE cations.
Revised: March 31, 2020 |
Published: March 1, 2020
Citation
Chong S., B.J. Riley, Z.J. Nelson, and S. Perry. 2020.Crystal structures and comparison of huntite aluminum borates REAl3(BO3)4 (RE = Tb, Dy, Ho).Acta Crystallographica. Section E: Structure Reports Online E76.PNNL-SA-150573.doi:10.1107/S2056989020001802